It is impossible for every person who speculates on cards from any era to all win. I think your point is well taken and this guy is a baseball fanatic so his chances are immensely better than the person just playing momentum. He does research and really attempts to understand the players fundamentals on the field and lets that drive his speculative activity. Just like stocks you have to sell. So this means you will miss out on some monster gains and you must get comfortable with that. This is a major headwind for the participants chances of success as outliers can make it appear that ones ability to consistently be right is much better than it really is so if you get an outlier on the way down you can be toast. For the most part every hot card is better to be sold into the hype and fast thin markets push a few sales much further than can be sustained in a short window of time and in many cases permanently so most of the time you should take the money. Some of the moves have been simply incredible. Jeremy Lin was an obvious sell! Probably a ton of others could be named.
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